NXT :: descendant of Bitcoin - Updated Information - page 2229.

laowai80

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Quote from: OKNXT on December 24, 2013, 02:12:14 AM

" There is insufficient memory for the Java Runtime Environment to continue."

My public node(2G RAM, 2CPU) went down after I added hallmark.

Yes, hallmarked nodes are under DDOS.

Try to run it like this:

java -Xms1200m -Xmx1500m -jar start.jar

I am not an expert on Java, play with those memory settings within your RAM limits, something could work. But DDOS sure causes a lot of issues.

abctc

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Quote from: Come-from-Beyond on December 24, 2013, 02:04:39 AM

Well, hallmarks would work if everyone used them. Wait for a few hours and I'll release a version with disabled hallmarks.

- what?? May be you should release a hallmarks-only version ?? I do not whant to see a zombies in me Active peers window. I want to see (and communicate) only with hallmarked peers.

New users just should use the other server to obtain some NXT to setup their own hallmarked node, or to continue use of public servers.

OKNXT

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" There is insufficient memory for the Java Runtime Environment to continue."

My public node(2G RAM, 2CPU) went down after I added hallmark.

laowai80

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Activity: 98

Merit: 10

Quote from: achimsmile on December 24, 2013, 02:10:00 AM

Am I on the right branch?

23578      4726268575002224579      24.12.2013 08:09:13
13      0 + 13      1'804 B
1      4648711128167189860      1395 %

yes

achimsmile

legendary

Activity: 1225

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Am I on the right branch?

23578      4726268575002224579      24.12.2013 08:09:13
13      0 + 13      1'804 B
1      4648711128167189860      1395 %

Come-from-Beyond

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Newbie

Quote from: abctc on December 24, 2013, 01:09:01 AM

- please do not delude yourself. We are constantly stuck with a much lower depth then 720 blocks.

Alice on block 23577 of longest chain, Bob on block 23400 on a shorter chain. How do u know where the fork has happened? It may happen 2000 blocks ago and Bob won't be able to jump to a legit chain without redownloading the whole blockchain.

laowai80

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Activity: 98

Merit: 10

Quote from: Come-from-Beyond on December 24, 2013, 02:04:39 AM

Quote from: 2Kool4Skewl on December 24, 2013, 12:46:31 AM

I'm sure that would be possible, but hallmarking nodes is just a bad idea in my opinion. Instead of using hallmarked nodes to stay in sync, nodes should simply use other nodes with the lowest ping time.

Well, hallmarks would work if everyone used them. Wait for a few hours and I'll release a version with disabled hallmarks.

Have it enabled by default though.
We should really try to set up this Special node donation fund and have everyone hallmark their nodes with at least 10 NXTs Weight.

OKNXT

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One more question: Is the account associated with the hallmark code forging? If it is forging during the service of public node, I think the general user would like to do it.

abctc

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Quote from: 2Kool4Skewl on December 24, 2013, 01:48:00 AM

I think having the network reliant upon VPS provided by benefactors is a bad idea. Nxt will then be centralized because it will depend on the people paying for VPS and the VPS providers. Both of these can be taken down.

- agree 100%

Come-from-Beyond

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Quote from: 2Kool4Skewl on December 24, 2013, 12:46:31 AM

I'm sure that would be possible, but hallmarking nodes is just a bad idea in my opinion. Instead of using hallmarked nodes to stay in sync, nodes should simply use other nodes with the lowest ping time.

Well, hallmarks would work if everyone used them. Wait for a few hours and I'll release a version with disabled hallmarks.

laowai80

member

Activity: 98

Merit: 10

@2Kool4Skewl,

please edit the first post as creator of the thread and say something about the need to create a public node if you want to use NXT. It's important to underline the significance of this to make sure NXT users set up the VPS node at the same time they buy their first NXTs, and the significance of the network and that NXTs aren't worth much without investing into infrastructure. Can link to my signature post on how to set up a VPS.

OKNXT

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One question: Are the peers listed as active peers hallmarked? How to verify a peer if it is hallmarked if I know IP address?

laowai80

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Activity: 98

Merit: 10

Quote from: 2Kool4Skewl on December 24, 2013, 01:48:00 AM

I think having the network reliant upon VPS provided by benefactors is a bad idea. Nxt will then be centralized because it will depend on the people paying for VPS and the VPS providers. Both of these can be taken down.

Well, we need many solutions on how to incentivize NXT users to create many nodes.
I think it'd be sort of automatic just like with miners of bitcoin invest into hardware, when the price of NXT grows, NXT users will invest into setting up a node.
But at the beginning we need some sort of bootstrapping mechanism to grow the network to mitigate risks of the next DDOS attack which will undoubtedly be much bigger. And we need to grow the network quick.

2Kool4Skewl

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Quote from: gbeirn on December 24, 2013, 01:50:40 AM

Quote from: 2Kool4Skewl on December 24, 2013, 01:48:00 AM

Quote from: laowai80 on December 24, 2013, 01:43:05 AM

Quote from: 2Kool4Skewl on December 24, 2013, 01:37:56 AM

Quote from: laowai80 on December 24, 2013, 01:35:47 AM

Quote from: gbeirn on December 24, 2013, 01:33:54 AM

Quote from: laowai80 on December 24, 2013, 01:31:59 AM

Quote from: opticalcarrier on December 24, 2013, 01:28:50 AM

you guys are confusing me with weight.... i have 6 hallmarked nodes, each on a separate IP. if i set the weight to 100 on all of them, then doesnt each hallmarked node appear to have 1/6 of my hallmarked accounts balance?

I think that no matter what you set the Weight too, the Weight will show what your account holds now. And if you add more to that account, the Weight will reflect that accordingly. So there is a need to set up a special 'node' account and fund it with 100 NXT only. Maybe someone can set up a donation fund just for that and verify that people indeed set up hallmarked nodes with the amount they received from the donation fund by looking up the IP in the peers list.

I think we are thinking along the same lines:

Edit: and since it is unrealistic to un-hallmark all nodes our only option is to hallmark as many as possible to spread out the number of targets which can be DDoS'd....and we wouldn't want too many hallmarked nodes to stand out above the others since they would be the first targets. So maybe we all agree to setup nodes with similar weights?

Yes, many 100 Weight nodes, or any other small number will do. Someone should manage the donation fund for that purpose specifically and verify that hallmarked nodes with paid out amounts are indeed running with the paid out Weight value.

There needs to be a fallback mechanism in the code to allow for nodes that do not receive a response from hallmarked nodes to then request data from lesser and lesser weighted nodes.

Actually, manually verifying would be tiresome, there needs to be a script coded, that checks all payees of the Special public node donation fund and then verifies if that IP is running and verify its hallmark. Should be all doable with the API requests. I think Weight value of 100 is too large. We need tens, possibly hundreds of thousands of such nodes, in the future when NXT price is higher that'd be too generous. People need to support the network anyway, so paying 10 NXTs to hallmark is enough, what do you think?

I think having the network reliant upon VPS provided by benefactors is a bad idea. Nxt will then be centralized because it will depend on the people paying for VPS and the VPS providers. Both of these can be taken down.

So then the only ideal situation is to remove hallmarking altogether? This way anyone can setup a node that is no greater or less than another making a DDoS attack only successful (and costly) to go after all the nodes?

This is one solution. With this solution you have the problem of zombie accounts. You can mitigate zombie accounts by having the software fallback to another node when the current node doesn't respond properly. As the network grows, the percentage of healthy nodes will increase making zombies less of an issue.

Another solution is to modify hallmarking, so everything hallmarked over 100 nxt has the same priority for peers.

Come-from-Beyond

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Quote from: 2Kool4Skewl on December 23, 2013, 09:52:14 PM

Come-from-beyond, can you please relay this information to BCNext? What are your thoughts? I hope the source code is release asap, so these problems can get sorted out quickly.

I'll add a parameter that will switch weighting on/off. Everyone should decide if they want to use it.

laowai80

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Quote from: gbeirn on December 24, 2013, 01:47:39 AM

Quote from: laowai80 on December 24, 2013, 01:45:36 AM

Quote from: 2Kool4Skewl on December 24, 2013, 01:40:42 AM

Quote from: laowai80 on December 24, 2013, 01:37:37 AM

Quote from: 2Kool4Skewl on December 24, 2013, 01:35:02 AM

a node hallmarked with 100 nxt and a node hallmarked with 100,000 nxt would have the same priority with peers.

CfB, please confirm if this is true?
If true, it shouldn't be that way, I think?
More weight = more trust from peers approach is better?

The problem with this is that heavily weighted nodes are bigger targets to attack and when they get attacked, they disrupt the network to greater extent because they are being used as the main nodes.

True, there shouldn't be linear progression, but still more Weight value should mean more trust.
Otherwise, a rich enough attacker could set up thousands of hallmarked nodes and disrupt the network.
So a sort of balance needs to be worked out here.

Or setup a very high Weight node and disrupt from the top down if the other nodes look to it?

Yes, that's why it has to be a balance.

2Kool4Skewl

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It also seems that hallmarked accounts with large balances completely overpower smaller hallmarked accounts. I don't think setting up a lot of hallmarked nodes with small balance will help much.

gbeirn

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